ssh-key: update elliptic curve dependencies (#543)

Updates the following:
- `ed25519-dalek` v3.0.0-rc.0
- `p256` v0.14.0-rc.10
- `p384` v0.14.0-rc.10
- `p521` v0.14.0-rc.10

Author: tarcieri

Cargo.lock

@@ -39,12 +39,12 @@ zeroize = { version = "1", default-features = false }
 argon2 = { version = "0.6.0-rc.8", optional = true, default-features = false, features = ["alloc"] }
 bcrypt-pbkdf = { version = "0.11", optional = true, default-features = false, features = ["alloc"] }
 dsa = { version = "0.7.0-rc.15", optional = true, default-features = false, features = ["hazmat"] }
-ed25519-dalek = { version = "3.0.0-pre.7", optional = true, default-features = false }
+ed25519-dalek = { version = "3.0.0-rc.0", optional = true, default-features = false }
 hex = { version = "0.4", optional = true, default-features = false, features = ["alloc"] }
 hmac = { version = "0.13", optional = true }
-p256 = { version = "0.14.0-rc.9", optional = true, default-features = false, features = ["ecdsa"] }
-p384 = { version = "0.14.0-rc.9", optional = true, default-features = false, features = ["ecdsa"] }
-p521 = { version = "0.14.0-rc.9", optional = true, default-features = false, features = ["ecdsa"] }
+p256 = { version = "0.14.0-rc.10", optional = true, default-features = false, features = ["ecdsa"] }
+p384 = { version = "0.14.0-rc.10", optional = true, default-features = false, features = ["ecdsa"] }
+p521 = { version = "0.14.0-rc.10", optional = true, default-features = false, features = ["ecdsa"] }
 rand_core = { version = "0.10", optional = true, default-features = false }
 rsa = { version = "0.10.0-rc.18", optional = true, default-features = false, features = ["sha2"] }
 sec1 = { version = "0.8", optional = true, default-features = false, features = ["point"] }